http://www.sbnation.com/nfl/2013/4/28/4278644/2013-undrafted-free-agents-tennessee-titans
Two of the players in the Titans' undrafted free agent haul hail from north of the border: Stefan Charles is a 6'5, 310-pound defensive lineman probably best suited for a tackle position from the University of Regina, and Matt Sewell from McMaster University is a whopping 6'8, 335 pounds. They've played a slightly different version of the sport their entire lives, and they've never played against strong competition - the Canadian college football ranks would probably compare unfavorably to FCS or even Division II competition here in America - but their size is legitimate. There's precedent for CIS players - Canadian Interuniversity Sport, duh - making it to NFL, with the Bears' Israel Idonije, the Chiefs' Cory Greenwood, the Dolphins' Vaughn Martin, and the Saints' Akiem Hicks all on NFL rosters. No Canadian players were drafted in 2013, although Hicks was a third-round pick in 2012.